Memory Leak Vulnerability in TIFF Package: CVE-2017-9936
Summary
ALPINE-CVE-2017-9936: In LibTIFF 4.0.8, there is a memory leak in tif_jbig.c. A crafted TIFF document can lead to a memory leak resulting in a remote denial of service attack. Affects tiff versions < 4.0.8-r1. Fixed in 4.0.8-r1. How to fix ↓
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Background
The TIFF (Tagged Image File Format) package is widely used for handling raster graphics images, particularly in the context of digital photography and scanning. It supports multiple layers and channels, making it a versatile choice for image storage. However, the package has been found to have a vulnerability that can lead to memory leaks, which can be exploited in certain scenarios.
Vulnerability Detail
In LibTIFF version 4.0.8, a memory leak exists in the tif_jbig.c file. This vulnerability can be triggered by a specially crafted TIFF document, leading to a remote denial of service attack. The memory leak occurs when the application fails to release allocated memory, potentially exhausting system resources and causing the application to crash or become unresponsive. The CVSS score for this vulnerability is 6.5, indicating a moderate severity level.
How To Fix
Minimum fixed version
4.0.8-r1
This is the first release that contains the fix.
sudo apk add --upgrade tiffTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid opening untrusted TIFF files or limit the use of the TIFF package until the update is applied. Additionally, consider using alternative image formats that do not exhibit this vulnerability.
Conclusion
The memory leak vulnerability in the TIFF package (CVE-2017-9936) poses a risk of denial of service through crafted TIFF documents. It is crucial to update to the patched version to ensure system stability and security. Users should also consider using Vulert to monitor for vulnerabilities in their applications.
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FAQ
CVE-2017-9936 is a vulnerability in the TIFF package that can lead to a memory leak, potentially causing a denial of service.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Exploiting this vulnerability can lead to a denial of service, where the application may crash or become unresponsive due to exhausted memory resources.
Yes, the patch is available in version 4.0.8-r1 of the TIFF package. Updating to this version will resolve the issue.
If an immediate update is not possible, refrain from using the TIFF package with untrusted files and consider alternative image formats.
References
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